Champlain Valley, Great Meadows Fm., late Tremadoc (Ordovician of the United States)

Where: New York (43.9° N, 73.4° W: paleocoordinates 31.5° S, 67.2° W)

• coordinate based on nearby landmark

When: Skene Member (Great Meadows Formation), Gasconadian (485.4 - 477.7 Ma)

• "Gasconadian stage" Originally "middle" member

Environment/lithology: peritidal; dolomite

• "dolomite, algalaminites, thrombolites, desication [sic]. strandline intertidal; normal to high salinities (BA1) ocean facing shelf (stable)"

Size class: macrofossils

Primary reference: S. J. Mazzulla and G. M. Friedman. 1977. Competitive algal colonization or peritidal flats in a schizohaline environment: the lower Ordovician of New York. Journal of Sedimentary Petrology 47:398-410 [M. Uhen/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 273: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "S.J.Mazzulla nad G.M. Friedman, 1977. Competitive algal colonization or peritidal flats in a schizohaline environment: the lower Ord. of NY. J.Sed.Pet. 47:398-410"
Show authors, comments, and common names
Trilobita
 Proetida - Hystricuridae
Hystricurus sp.
Hystricurus sp. Raymond 1913 trilobite
originally entered as "Hystricarus sp."
 Ptychopariida - Kingstoniidae
Clelandia sp.
Clelandia sp. Cossman 1902 trilobite
 Asaphida - Nileidae
Symphysurina sp.
Symphysurina sp. Ulrich 1924 trilobite
Cephalopoda
 Ellesmerocerida - Ellesmeroceratidae
Clarkoceras sp., Ectenoceras sp., Ellesmeroceras sp.
Clarkoceras sp. Ruedemann 1905
"transported?"
Ectenoceras sp. Ulrich and Foerste 1936
Ellesmeroceras sp. Foerste 1921
"transported?"
Gastropoda
 Euomphalina - Ophiletidae
Ozarkina sp., Ophileta sp.
Ozarkina sp. Ulrich et al. 1931 snail
Ophileta sp. Vanuxem 1842 snail
 Eogastropoda - Sinuopeidae
Gasconadia sp.
Gasconadia sp. Weller and St. Clair 1928 snail
Rostroconchia
 Ribeirioida - Technophoridae
Ribeiria sp.
Ribeiria sp. Sharpe 1853
Rhynchonellata
 Orthida - Finkelnburgiidae
Finkelnburgia sp.
Finkelnburgia sp. Walcott 1905
Lingulata
 Lingulida - Obolidae
Lingulella sp.
Lingulella sp. Salter 1866